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1. 发明授权

US07180358B2 CMOS exponential function generating circuit with temperature compensation technique 失效
标题翻译：具有温度补偿技术的CMOS指数函数发生电路
公开(公告)号：US07180358B2
公开(公告)日：2007-02-20
申请号：US11004432
申请日：2004-12-03
申请人： Jong Kee Kwon , Mun Yang Park , Jong Dae Kim , Won Chul Song
发明人： Jong Kee Kwon , Mun Yang Park , Jong Dae Kim , Won Chul Song
IPC分类号： G06G7/20
CPC分类号： H03F3/45928 , H03F3/45179 , H03F3/45475 , H03F2203/45212 , H03F2203/45482 , H03F2203/45484 , H03F2203/45508 , H03G7/001
摘要： Provided is a CMOS exponential function generating circuit capable of compensating for the exponential function characteristic according to temperature variations. The exponential function generating circuit includes an voltage scaler scaling the value of an external gain control voltage signal, an exponential function generating unit generating exponential function current and voltage in response to a signal output from the voltage scaler, a reference voltage generator providing a reference voltage to the exponential function generating unit, and a temperature compensator compensating for the exponential function characteristic according to temperature variations.
摘要翻译：提供了能够根据温度变化补偿指数函数特性的CMOS指数函数发生电路。指数函数发生电路包括缩放外部增益控制电压信号的值的电压缩放器，响应于从电压调节器输出的信号产生指数函数电流和电压的指数函数产生单元，提供参考电压的参考电压发生器到指数函数产生单元，以及根据温度变化补偿指数函数特性的温度补偿器。

2. 发明授权

US6091289A Low pass filter 失效
标题翻译：低通滤波器
公开(公告)号：US6091289A
公开(公告)日：2000-07-18
申请号：US99388
申请日：1998-06-18
申请人： Won Chul Song , Jong Ryul Lee , Chang Jun Oh , Jong Kee Kwon , Ook Kim , Kyung Soo Kim
发明人： Won Chul Song , Jong Ryul Lee , Chang Jun Oh , Jong Kee Kwon , Ook Kim , Kyung Soo Kim
IPC分类号： H03H9/46 , H03H11/04 , H03K5/00
CPC分类号： H03H11/04
摘要： There is disclosed a low frequency filter. A low frequency cutoff filter includes a filter circuit having a capacitor connected between an input terminal and an output terminal and an active resistor connected to the output terminal, having a very large resistance, and a bias circuit having a negative feedback to set a biasing voltage of the active resistor to a desired value, thereby implementing the cutoff filter within a semiconductor chip as one set with the capacitor having a small capacitance. A low frequency pass filter includes an active resistor having a very large resistance, means for setting a biasing voltage of the active resistor to a desired value, and a capacitor connected between the output terminal and the ground. Therefore, the low pass filter can be integrated-circuited using even small capacitor.
摘要翻译：公开了一种低频滤波器。低频截止滤波器包括滤波器电路，其具有连接在输入端子和输出端子之间的电容器和连接到具有非常大电阻的输出端子的有源电阻器，以及具有负反馈以设置偏置电压的偏置电路将所述有源电阻器设置为期望值，从而在半导体芯片内实现截止滤波器作为一组，其中电容器具有小电容。低通滤波器包括具有非常大电阻的有源电阻器，用于将有源电阻器的偏置电压设置为期望值的装置，以及连接在输出端子和地之间的电容器。因此，低通滤波器可以使用甚至小的电容器集成。

3. 发明授权

US6069537A Double mode modulator 失效
标题翻译：双模式调制器
公开(公告)号：US6069537A
公开(公告)日：2000-05-30
申请号：US124142
申请日：1998-07-29
申请人： Ook Kim , Jong Kee Kwon , Jong Ryul Lee , Chang Jun Oh , Won Chul Song , Kyung Soo Kim
发明人： Ook Kim , Jong Kee Kwon , Jong Ryul Lee , Chang Jun Oh , Won Chul Song , Kyung Soo Kim
IPC分类号： H04B1/00 , H04B1/40 , H04L27/00 , H04L27/20 , H04L27/32
CPC分类号： H04L27/0008 , H04B1/406 , H04L27/2071 , H04B1/00
摘要： A double mode modulator, particularly, for a portable telephone, which is adapted to realize both digital and analog modulations and have a low phase noise and a reduced locking time with a device readily integrated in an integrated circuit, including: a frequency synthesizer for synthesizing a particular frequency from an external reference clock signal; a digital modulator for performing a quadrature modulation for an output signal of the frequency synthesizer; and an analog modulator for performing a frequency modulation for the output signal of the frequency synthesizer.
摘要翻译：一种双模式调制器，特别是用于便携式电话，其适于实现数字和模拟调制，并且具有低相位噪声和减少的锁定时间，其中易于集成在集成电路中的器件包括：用于合成的频率合成器来自外部参考时钟信号的特定频率; 用于对频率合成器的输出信号执行正交调制的数字调制器; 以及用于对频率合成器的输出信号执行频率调制的模拟调制器。

4. 发明授权

US06400932B1 Low offset automatic frequency tuning circuits for continuous-time filter 有权
标题翻译：低偏移自动频率调谐电路，用于连续时间滤波
公开(公告)号：US06400932B1
公开(公告)日：2002-06-04
申请号：US09454389
申请日：1999-12-03
申请人： Chang Jun Oh , Jong Kee Kwon , Jong Ryul Lee , Won Chul Song , Hee Bum Jung , Kyung Soo Kim , Han Jin Cho , Ook Kim
发明人： Chang Jun Oh , Jong Kee Kwon , Jong Ryul Lee , Won Chul Song , Hee Bum Jung , Kyung Soo Kim , Han Jin Cho , Ook Kim
IPC分类号： H04B118
CPC分类号： H03H11/0422 , H03L7/06
摘要： The present invention relates to a tuning circuit, more specifically to a tuning circuit for continuous-time filter capable of making exact the Gm value to minimize the variation of the cutoff frequency due to the variation of process in the Gm-C type of continuous-time filter. According to the invention, a frequency tuning circuit is provided which comprises integrating means for generating a signal discharging from a first reference voltage to a first predetermined value and a signal charging from a second reference voltage to a second predetermined value; offset sampling means for sampling the offset voltages of the Gm cells by receiving a current multiplied by the offset voltages from the Gm cells included in the integrating means and providing a feedback path between the output nodes and the input nodes of the included Gm cells; comparative signal generating means for generating a comparative signal by generating a reference signal by dividing a clock inputted from the external, receiving the signal discharging from the first reference voltage to the first predetermined value and the signal charging from the second reference voltage to the second predetermined value from the integrating means, and comparing the actual intersection and the target intersection of these signals; and control means for generating a control signal to regulate the Gm values of the integrating means and the offset sampling means by receiving the reference signal and the comparative signal from the comparative signal generating means and detecting the phase differences therebetween.
摘要翻译：调谐电路技术领域本发明涉及一种调谐电路，更具体地说涉及一种用于连续时间滤波器的调谐电路，其能够精确地确定Gm值，以使由于Gm-C型连续时间滤波器中的工艺变化引起的截止频率的变化最小化，时间过滤器。根据本发明，提供了一种频率调谐电路，其包括用于产生从第一参考电压放电到第一预定值的信号的积分装置和从第二参考电压到第二预定值的信号充电; 偏移采样装置，用于通过接收与积分装置中包括的Gm单元的偏移电压相乘的电流来对Gm单元的偏移电压进行采样，并在输出节点和所包括的Gm单元的输入节点之间提供反馈路径; 比较信号发生装置，用于通过将从外部输入的时钟分频，将从第一参考电压放电的信号接收到第一预定值和从第二参考电压到第二预定值的信号充电来产生参考信号，从积分装置获取值，并比较这些信号的实际交点和目标交点; 以及控制装置，用于通过从比较信号发生装置接收参考信号和比较信号并检测它们之间的相位差，产生控制信号以调节积分装置和偏移采样装置的Gm值。

5. 发明授权

US06043970A High voltage driving circuit reducing a transient current 有权
标题翻译：高压驱动电路减少瞬态电流
公开(公告)号：US06043970A
公开(公告)日：2000-03-28
申请号：US136611
申请日：1998-08-20
申请人： Q Sang Song , Mun Yang Park , Won Chul Song , Jin Gun Koo
发明人： Q Sang Song , Mun Yang Park , Won Chul Song , Jin Gun Koo
IPC分类号： G09G3/28 , H03K19/003 , H02H3/00
CPC分类号： H03K19/00315 , G09G3/22 , G09G3/28 , G09G3/30 , G09G2310/0289 , G09G2310/0291 , G09G2330/02 , G09G3/296
摘要： The present invention relates to a high voltage driving circuit for preventing an transient current. The high voltage driving circuit including a non-overlap signal generator for generating the first and second non-overlap signals in response to the logic level signal, a satge for generating a first driving signal in response to the logic level signal and the first and second non-overlap signals, a pre-driving circuit which is driven in response to the first non-overlap signal and the first driving signal, and a complementary output circuit for controlling a current flowing toward the output terminal in response to the output signal of the pre-driving circuit and the second non-overlap signal.
摘要翻译：本发明涉及一种用于防止瞬态电流的高压驱动电路。高电压驱动电路包括：非重叠信号发生器，用于响应于逻辑电平信号产生第一和第二非重叠信号;响应于逻辑电平信号产生第一驱动信号的第一和第二非重叠信号，响应于第一非重叠信号和第一驱动信号而被驱动的预驱动电路，以及互补输出电路，用于响应于输出端的输出信号控制流向输出端的电流预驱动电路和第二非重叠信号。

6. 发明授权

US6094103A Multiple feedback loop ring oscillator and delay cell 失效
标题翻译：多反馈回路环形振荡器和延迟单元
公开(公告)号：US6094103A
公开(公告)日：2000-07-25
申请号：US99566
申请日：1998-06-18
申请人： Dong Youl Jeong , Gyu Hyung Cho , Sang Hoon Chai , Won Chul Song , Kyung Soo Kim
发明人： Dong Youl Jeong , Gyu Hyung Cho , Sang Hoon Chai , Won Chul Song , Kyung Soo Kim
IPC分类号： H03B5/24 , H03K3/0231 , H03K3/03 , H03L7/099 , H03B27/00
CPC分类号： H03L7/0995 , H03B5/24 , H03K3/0231 , H03K3/03 , H03K3/0322
摘要： Disclosed is a multiple feedback loop ring oscillator and delay cell with high oscillation voltage. It is an object of the present invention to implement a new ring oscillator for the VCO of a high speed PLL and a proper delay cell with a high speed and low noise. The apparatus is composed of multiple feedback loop ring oscillator that 4 delay cells which have the first main input stage, the second main input stage, the first subsidiary input stage, the second subsidiary input stage, the third subsidiary input stage, the forth subsidiary input stage, the first output stage and the second output stage is connected to the main loop and subsidiary loop. The present invention has advantages that it can be operated in high speed, it has a low power sensitivity, there is no power noise because there is no variation of a supply current and it can improve noise characteristics.
摘要翻译：公开了具有高振荡电压的多反馈环路振荡器和延迟单元。本发明的目的是实现用于高速PLL的VCO的新环形振荡器和具有高速度和低噪声的合适的延迟单元。该装置由具有第一主输入级，第二主输入级，第一辅输入级，第二辅输入级，第三辅输入级，第四副输入级的4个延迟单元的多反馈环形环形振荡器阶段，第一输出级和第二输出级连接到主回路和辅助回路。本发明的优点是可以高速运转，具有低功率灵敏度，不存在电源噪声，因为不存在电源电流的变化并且可以改善噪声特性。

7. 发明授权

US06259321B1 CMOS variable gain amplifier and control method therefor 有权
标题翻译： CMOS可变增益放大器及其控制方法
公开(公告)号：US06259321B1
公开(公告)日：2001-07-10
申请号：US09490732
申请日：2000-01-25
申请人： Won Chul Song , Chang Jun Oh , Hee Bum Jung
发明人： Won Chul Song , Chang Jun Oh , Hee Bum Jung
IPC分类号： H03F345
CPC分类号： H03G1/0029 , H03F3/45188 , H03F2203/45458 , H03F2203/45702
摘要： A CMOS high frequency variable gain amplifier with maximum high frequency operation and wide variable gain characteristics that is formed from an amplifier having a plurality of variable gain amplifier cells connected in series for continuously enabling wide gain variation; and a control voltage generator for generating and outputting the control voltage of the variable gain amplifier cells. By using both the saturation region and the linear region of input differential transistors constituting the variable gain amplifier cells in order to obtain wide gain variation characteristics, it is possible for the variable gain amplifier to operate in the saturation region when the input signal is small to obtain a high gain and to operate in the linear region when the input signal is large to obtain minimum distortion and a low gain. Also, it is possible for the gain to have the characteristics in the form of an exponential function to the gain control voltage.
摘要翻译：具有最大高频运算和宽可变增益特性的CMOS高频可变增益放大器，其由具有串联连接的多个可变增益放大器单元的放大器形成，以连续实现宽增益变化; 以及用于产生和输出可变增益放大器单元的控制电压的控制电压发生器。通过使用构成可变增益放大器单元的输入差分晶体管的饱和区域和线性区域，为了获得宽的增益变化特性，当输入信号小到等于可变增益放大器时，可以在饱和区域中工作获得高增益并且在输入信号大时在线性区域中操作以获得最小失真和低增益。此外，增益可以具有对增益控制电压的指数函数形式的特性。

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